Ace compile hangs after "loaded grammar in ... seconds"

After running the “ace -G yaq.dat -g ace/config.tdl” command, the grammar begins to compile as expected, but hangs after saying “loaded grammar in 0.89765 seconds”, for example. I tarred the directory and send it over to someone else who was not having the same problem in their virtual machine as I am. Is this a common error? What else can I try in order to fix this? Giving it time and just waiting doesn’t quite seem to be enough.